A person that owns a Facebook account and constantly clicks the “Like” button to all of their “friends” Facebook activity, instead of spending one once of brain power to write a full comment in response to their “friends” posts or check-in's. Generally they “like” their “friends” Facebook activity after it has becomes a day or two old or sometimes “like” Facebook activity after it is no longer important.

Example 1
Stan: “Dude I’m deleting off my Facebook.”
Alan: “What?! Why?!”
Stan: “Cause all you are is a consta-like and I’m sick of getting excited when I get a notification on my iPhone thinking its something important and it’s just you liking something stupid, like when I was tagged in Keith's check-in at the restaurant last night!”

Three Days Later....

Example 2
Keith: “Oh I just got a notification from Facebook on my iPhone. Damn it was just Alan clicking “like” to my check-in when I was at the restaurant the other night,what a consta-like!”
Alan: “Dude I’m standing right here…”
Keith: “Yeah I know…”